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Risk Analysis for Reservoir Collapse by a Multi-hazard Approach

  • Crisisonomy
  • Abbr : KRCEM
  • 2018, 14(11), pp.123-134
  • DOI : 10.14251/crisisonomy.2018.14.11.123
  • Publisher : Crisis and Emergency Management: Theory and Praxis
  • Research Area : Social Science > Public Policy > Public Policy in general
  • Received : September 21, 2018
  • Accepted : November 14, 2018
  • Published : November 30, 2018

Young Kyu Lee 1

1한국화재보험협회부설방재시험연구원

Accredited

ABSTRACT

In the study, we infer the causes of the Mowon Reservoir Collapse which occurred in 2018. It was figured out that the Mowon Reservoir Collapse was induced by the hazards from changes in waterway, reservoir area, land cover, and rainfall. We analyzed the risk of collapse for 3,186 reservoirs managed by the Korean Rural Community Corporation (KRCC) through a multi-hazard approach. The consequences of the reservoir collapse were categorized to 5 classes, assuming that the losses by collapse are proportional to reservoir capacities. The likelihoods were rated for each class according to the scores determined by the hazards from reservoir inspection grade, rainfall change, earthquake magnitude change, land cover change, and fire area. The reservoir collapse risks were calculated by a risk matrix of likelihood and consequence. Naju, Yeongam and Gyeongju were identified as the most risky Si-gun-gu’s according to the total sum risks.

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